为什么在休眠状态下我的EmbeddedId无法正常工作？ [英] Why is my EmbeddedId in hibernate not working?

问题描述

HolidayPackageVariant 其中在中有一个复合主键（IDHOLIDAYPACKAGE，IDHOLIDAYPACKAGEVARIANT） IDHOLIDAYPACKAGE 指的是 HolidayPackageVariant 与 之间的 Many 至 One 关系的实体 em> HolidayPackage 。

当我尝试在HolidayPackageVariant中执行compund PK映射时，出现以下错误：

初始化SessionFactory创建
failed.org.hibernate.annotations.common.AssertionFailure：在继承状态层次结构中找不到
类：
org.wah.model.holidaypackage.HolidayPackageVariantPrimaryKey

有人可以告诉我我在这里做错了什么？

我的POJO看起来像这样：
$ b

HolidayPackageVariant：
blockquote>

  @Entity 
 @Table（name = HOLIDAYPACKAGEVARIANT）
 public final class HolidayPackageVariant {
 
 private HolidayPackageVariantPrimaryKey idCompound; 
 
 @EmbeddedId 
 public HolidayPackageVariantPrimaryKey getIdCompound（）{
 return idCompound; 
} 
 
 //其他代码
} 
  

HolidayPackageVariantPrimaryKey

  @Embeddable 
 public final class HolidayPackageVariantPrimaryKey实现Serializable {
 
 private Integer idHolidayPackageVariant; 
私人HolidayPackage holidayPackage; 
 $ b $ public HolidayPackageVariantPrimaryKey（）{} 
 $ b public HolidayPackageVariantPrimaryKey（int id，HolidayPackage pkg）{
 setIdHolidayPackageVariant（id）; 
 setHolidayPackage（pkg）; 
 
 
 @Id 
 @GeneratedValue（strategy = GenerationType.IDENTITY）
 @Column（name =IDHOLIDAYPACKAGEVARIANT，nullable = false）
 public Integer getIdHolidayPackageVariant（）{
 return idHolidayPackageVariant; 
} 
 
 @Id 
 @ManyToOne（fetch = FetchType.LAZY，cascade = {CascadeType.ALL}）
 @JoinColumn（name =IDHOLIDAYPACKAGE，可为空= false）
 public HolidayPackage getHolidayPackage（）{
 return holidayPackage; 
} 
 
 // equals和hashCode 
} 
  

< blockquote>

HolidayPackage

  public final class HolidayPackage {
私人套餐< HolidayPackageVariant> holidayPackageVariants = new HashSet< HolidayPackageVariant>（0）; 
 
 @OneToMany（fetch = FetchType.LAZY，cascade = {CascadeType.ALL}，mappedBy =idCompound.holidayPackage）
 public Set< HolidayPackageVariant> getHolidayPackageVariants（）{
返回holidayPackageVariants; 
} 
 
 //其他代码
} 
  

解决方案

您不应在 EmbeddedId 类中拥有 @Id 。删除 HolidayPackageVariantPrimaryKey 中的 Id 注释，它应该可以正常工作。

I have a compound Primary Key (IDHOLIDAYPACKAGE, IDHOLIDAYPACKAGEVARIANT) in table HolidayPackageVariant where IDHOLIDAYPACKAGE refers to entity HolidayPackage with a Many to One relationship between HolidayPackageVariant and HolidayPackage.

When I try to do the compund PK mapping in HolidayPackageVariant, I get the following error:

Initial SessionFactory creation failed.org.hibernate.annotations.common.AssertionFailure: Declaring class is not found in the inheritance state hierarchy: org.wah.model.holidaypackage.HolidayPackageVariantPrimaryKey

Can someone please tell me what am I doing wrong here ?

MY POJOs look like this:

HolidayPackageVariant:

@Entity
@Table(name="HOLIDAYPACKAGEVARIANT")
public final class HolidayPackageVariant {

    private HolidayPackageVariantPrimaryKey idCompound;

    @EmbeddedId
    public HolidayPackageVariantPrimaryKey getIdCompound() {
        return idCompound;
    }

    // other code
}

HolidayPackageVariantPrimaryKey

@Embeddable
public final class HolidayPackageVariantPrimaryKey implements Serializable {

    private Integer idHolidayPackageVariant;
    private HolidayPackage holidayPackage;

    public HolidayPackageVariantPrimaryKey(){}

    public HolidayPackageVariantPrimaryKey(int id, HolidayPackage pkg){
        setIdHolidayPackageVariant(id);
        setHolidayPackage(pkg);
    }

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "IDHOLIDAYPACKAGEVARIANT", nullable = false)
    public Integer getIdHolidayPackageVariant() {
        return idHolidayPackageVariant;
    }

    @Id
    @ManyToOne(fetch=FetchType.LAZY, cascade={CascadeType.ALL})
    @JoinColumn(name="IDHOLIDAYPACKAGE", nullable=false)
    public HolidayPackage getHolidayPackage() {
        return holidayPackage;
    }

    // equals and hashCode
}

HolidayPackage

public final class HolidayPackage {
    private Set<HolidayPackageVariant> holidayPackageVariants = new HashSet<HolidayPackageVariant>(0);

    @OneToMany(fetch=FetchType.LAZY, cascade={CascadeType.ALL}, mappedBy = "idCompound.holidayPackage")
    public Set<HolidayPackageVariant> getHolidayPackageVariants() {
        return holidayPackageVariants;
    }

    // other code
}

解决方案

You shouldn't have the @Id in the EmbeddedId Class. Remove the Id annotation in your HolidayPackageVariantPrimaryKey and it should work fine.

这篇关于为什么在休眠状态下我的EmbeddedId无法正常工作？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！